ALBANY – The Port Authority is buying three “armored personnel carriers” to beef up airport security, The Post has learned.

The three bulletproof vehicles, designed to transport as many as eight heavily armed police officers, will be assigned to Kennedy, La Guardia and Newark airports, said a PA spokesman.

The vehicles “have the capability of being used in response to security threats, or to move police officers around the airport in a secure way if there’s a threat around the airport or on the tarmac,” said PA spokesman Allen Morrison. He said the military-style vehicles – estimated to cost about $300,000 each – can also be used to “transport certain high-value cargoes.”